Improvement in printing-presses



l 3Sheets--Sheet1. GEORGE PROUTY.

Improvement in Printing Pres'ses.

NO. 121,256. Patepted Nqv.28,1871.

WITNESSES I I INVENTOR "\wmiim 7 MC 4M mara-urlmcbnmm m M x anon/1:1:man-s1] 1 3Sheets--Sheet 2. GEORGE W. PR'OUTY.

improvement in Printing Presses.

No. 121,256, I Patented No'v.28,1871.

v vn'usssas INVENTQB 1 3Sheets- -Sheet? GEORGE W. PROUTY.

Improvement in Printing Press-es. I

No. 121,256. Pa tented Nov- 28,1871.

INVENTOR UNITED STATES PATENT OFFICE.

GEORGE W. PROUTY, OF GHARLESTOWN, MASSACHUSETTS.

IMPROVEMENT lN PRlNTlNG-PRESSES.

Specification forming part of Letters Patent No. 121,256, dated November28, 1871.

and the mode of connecting it with the other parts of the press. Fig. 3represents a transverse section on the line A B of Fig. 1.

This invention relates to that kind of printingpresses which isgenerally operated by hand or foot-power, and wherein the oscillating orswinging platen is pivoted to the frame-work and operated by cranks andconnecting-rods to give the impression. This invention consists of anarrangement and combination of gears and suitable connections foroperating the crankshaft which connects with and operates the platen,thereby imparting to the latter the regular motions, and a positiveperiod of rest at each end of the strokethat is, while taking theimpression --and at the opposite end of the stroke sufficient time forthe removal of a printed card or sheet and for replacing a blank to beprinted, both periods of rest being about equal. In connection with theabove-described mechanism, this invention consists of an arrangement andcombination of chains and wheels for operating the inking-rolls and thedistributing-roll, both ends of each chain being connected to the standswhich carry the rolls, at opposite ends thereof, while the centralportion of each chain or cord passes one or more times around achaindriving wheel of suitable circumference to traverse the ink-rollsacross the bed and the type and out of the way of the platen, thechain-wheels serving the twofold purpose of operating the inkrolls andalso the platen, and both receive their motion from the operatingmechanism first above referred to.

In the drawing, let A represent the drivingshaft provided at one endwith a crank or pulley, B, and near the opposite end with a spurpinion,O, which meshes into a spur-gear, D, arranged upon a stud, and all thesehave a continuous rotary motion. One end of a connectingrod, E, isloosely pivoted or applied to a crankpin projecting from the gear D. Theupper end of the rod E is connected, by a similar crank-pin, to asegmentary-gear, F, moving on a stud, a. Above the shaft A is thechain-wheel shaft Gr,

arranged in suitable bearings on the back of the frame-work. Near oneend of this shaft G is a pinion-gear, d, the teeth of which intersectwith the teeth of the segment F, which gives the pinion and its shaftand wheel their motion. On the opposite ends of the shaft G I secure thechain-wheels H, and to these wheels I pivot the arms I, which connectwith and operate the platen J. Roller-stands K are arranged to move invertical grooves formed in the front of the frame-work; and theinking-rolls'm and p and the distributing-roll e are arrangedin thesestands in the usual way. Each chain-wheel H has a grooved rim sufficientto receive the chain or cord L, which passes one or more times aroundand is led in opposite directions, one end leading upward and over apulley, c, thence downward and connected to the roller-stand K, theopposite end of said chain leading downward under a pulley, g, andupward, connecting with the roller-stand K, all as clearly shown in thedrawmg.

Rotary motion being imparted to the shaft A and pinion 0 causes thespur-gear D to rotate, and this operates the connection E and thesegment F. The latter having a reciprocating or oscillating motionimparts the same motion to the pinion d and its shaft G, and thechain-wheels H thereon. Each motion of the chain-wheels and theconnected chains carries the inking-rolls across the bed and the typefirst in one direction, then in the opposite direction, or upward by onemotion and downward by the other. The periods of rest for the platen arepredetermined and provided for by the connecting-rod E and by itspivoted connection with the gear D while passing over the center at eachend of the stroke. The diflerent positions of the connection E whilepassing the center of the upper stroke are clear- K, all constructed,combined, and operating in the manner and for the purpose specified.

2. The combination of the gear D, the connection E, the segment F, theconnecting-rod I, and platen J, as herein described.

GEORGE W. PROUTY.

Witnesses: M. M. T1131), JOHN E. CRANE.

